hi
well, I can't well the image so, I'll give my opinion accordingly your description:
- If a player competes with another on used resources (primary ones), not delivering cargo to where's accepted (can be with transfers, but cargo must reach a final destination where accepted) or competing, delivering always to the closest industry - when not his normal gameplay -, it's clear that's
ONLY to delay and slow other player progress. And both situations fit on current
rule #5
: Do not block or
sabotage other players. No land reserving of any kind. Do not put full load orders on road vehicles in shared towns/cities. This means it's NOT allowed for me. It's a mere common sense

In other words, when a player starts taking actions that won't help his company to reach server goal, he starts entering on actions not allowed by the rules. This way it's simpler to realize and judge many situations ^^
enjoy the games
regards
ST2